"This book is not supposed to be a thorough guide to RPC using XML... however, if you're just getting started creating apps which interact with a remote server over HTTP, using any of the languages, then it gets you started with the fundamentals without confusion or jumping in too deeply without sufficient background knowledge of the proc...

This book introduces the main ideas and concepts behind core and extended Web services' technologies and provides developers with a primer for each of the major technologies that have emerged in this space.